Lathe.



N. D. GHARD.

LATHE.

APPLICATION FILED SEPI'. 2z, 1909.

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LATHB. A AlPLIoATIoN FILED SEPT. 22, 1909.

1,007,181. Patented 001.' 31, 1911.

2 SHEETS-SHEET 2.

attoznuo UNITED sTATEs PATENT oEEioE.

, NICHOLAS D. CHARD, OF CINCINNATI, OHIO, ASSIGNOR TO THE LODGE @cSHIPLEY MACHINE TOOL CO., OF CINCINNATI, OHIO, A CORPORATION.

LATHE.

Specification of Letters Patent.l

Application filed September 22, 1909. Serial No. 519,025.

To all. whom 'it' mayA concern;

Be it known that I, NICHOLAS D. CHARD, a citizen of the United States,residing at Cincinnati, in the county of Hamilton and State'of Ohio,have invented certain new and useful Improvements in Lathes, of whichthe following is a specification.

My invention relates'to an improvement in lathes.

One of the objects of my invention is to provide means for automaticallystopping the feed of the carriage at predetermined points.

Another object of my invention is to provide a lathe with a series ofadjustable stops in the path of carriage movement adapted to ,be engagedby means carried by the carriage for automatically stopping its feedthereof with the carriage provided with means for releasing its'stop.and automatically throwing in the feed and positioning the parts foravsecond sto 'i Another object of my i-nvention. is to provide a lathewith a series of stops in the path of the carriage movement adjust-ablymounted and' arranged to permit periodical interference and engagementof carriage feed without change of position of cutting tool relative tothe work.

The various features of my invention. are more fully set forth in thedescription 0f the accompanying drawings, forming a part of this.specification, in which Figure .1 is side elevation of a lathe trolling.the feed of the carriage applied. Fig. 2 is an enlarged section on linea', 5c, Fig. l. Fig. 3 is an enlarged section through ing its means forengaging and disengaging the same from the main drive. Fig. 4 is asection on line y, y, Fig. 2.- Fig. 5 is an end elevation of the latheapron, illustrating the means thereon to engage stops for frontelevation thereof. Fig. 7 is an enlarged section on line w, w, Fig. 6,illustrating the means for clamping the stops. Fig. 8 is the section online o, o, Fig. 6.

' It has long been desirable to provide an engine screw cutting lathewith means whereby the same can perform the functions and turn out thework now accomplished upon a special machine known to the trade as aturret lathe, inwhich 'a piece of work Patented oet. 3i, 191i.

is required to be brought against the action of a series of tools tocomplete the same without rechucking the work upon the headstock, orremoving the same frointhe machine until completed.

- With my improved lathe it is possible to turn out duplicate pieces ofwork with various diameters with predetermined widths to each diameter,without stopping the machine to gage the work, the same being taken careof by the means for stopping the feed of the carria e when the same hastrav-V eled a predetermined length for a desired width of cut, andsecond, limiting the movement of the slide plate carryin the tools, forcutting a predetermined diameterl byl movement of the slide in onedirection with the reverse movement thereof, bringing a second stop intoposition for turning a second diameter, the latter feature is made thesubject of a separate application, to-wit,

without liability of mistake, rendering a saving of time and accuracywith the machine in the hands of an unskilled operator, it being knownthat a great deal of lost time is had by stopping the machine to gage upthe work in the ordinary methods of metal turning, and with my improvedlathe duplicate parts can be formed of certain classes The various partsfor controlling the .iious speeds' areeasily and quickly thrown 1 out ofposition, putting the lathe in commislsion for ordinary use.

one end of the carriage feed shaft, illustratl represents the bed of thelathe, 2 the @head-stock, which, as illustrated, is of a 1type to clampthe work within the spindle and thedetails of which are shown and de-;scribed, and form a part of a separate apjplication filed on even dateherewith.

controlling the carriage feed. Fig. 6 is a 3 represents the lathecarriage, 3a, 4 the apron therefor, provided with the usual gearing andappliances for feeding the carriage longitudinally upon the bed orbase 1. The gearing, being of -well-known construction, is not shown, isin driving connection with .the feed-screw shaft 5, said shaft beingjournaled inthe bearings 6, at each end of the lathe bed. The screw feedshaft is of two part form, in which the two sections are adapted to beclutched together to transmit f of work, without the use of gigs orspecial :,work-holding means and guides. withQ iny improvements relativeto conmotion from one to the other, and further, to enable the controlof the feed automatically.

7 represents the section of the feed-screw shaft receiving motionthrough a train of gears or equivalent leading from the lathe spindle,which may be of construction and of a method desired and common withmachine tools of this class, for transmitting motion from the main driveto the carriage feed shaft.

8 represents a screw section of the feedshaft 5, fitting at one end intothe section 7, serving as a bearing therefor, when the drivingconnection between the two sections is released.

9 represents a clutch sleeve provided with clutch teeth, adapted toengage with the clutch teeth 10, formed upon a flange of the section 7of the feed-screw shaft, said sleeve 9 being supplied with teeth to thescrew shaft section 8. 11 represents a collar fixed to the screw shaftsection 8, and 12 represents a spring bearing against the collar 11, atone end, and against the clutch sleeve 9 for normally engaging theclutch sleeve 9 with the clutch portion of screw shaft Section 7, fortransmitting motion to the screw section 8. Thus, under normalconditions and uses of the lathe, the feed screw shaft is in drivingrelation with its driving elements for feeding the carriage.

In order to automatically control the feed of the carriage to stop thesame at a predetermined distance o f its travel and produce a series ofsuch stops, I have provided the following instrumentalities :-13represents a stop-supporting rail preferably slidable in bracketsprojecting from the lathe bed, upon which rail are adjustably mounted aseries of stops 14, 15, 16, 17 and 18, arranged and constructed so as topermit individual adjustment relative to each other and collectively toa unit to aline them all to one fixed degree or point, as is illustratedin` Fig. 6., This enables the adjusting of several stops to any fractionof an inch relativelyA to each other. Five stops are shown, butmore orless may be provided, as desired. The stop rail 13 may be provided withgraduation not shown, for conveniently adjusting the stops thereon.

The stop rail 13 is provided with the yokeplate 19'xed. thereto, andstraddling one arm of the clutch-actuating lever 20, pivotally mountedto the bed of the lathe, with its opposite arm provided with a yoke 21,engaged into the groove 22 of the clutch sleeve 9. Thus, when actionthrough the 'travel of the 'carriage is brought against one Of--thestops fixed to the stop-rail, the lstoprail will move with the carriageuntil the clutch-sleeve 9 is thrown out of engagement with theclutch-sleeve 10, of the screwshaft section 7. To accomplish this by thetravel of the carriage, the following mechanism is provided :-23represents a plate fixed to one end of the carriage-apron 4, providedwith a slide-way 24, within which the stop-bar 25 slides, said stop-baris preferably provided with rack teeth 26, intermeshed with arack-pinion 27, fixed to a stud-shaft 28, journaled in the plate 23. 29represents a hand-lever fixed to the studshaft 28, for rotating thepinion 27, to raise or lower the stop-bar 25. 30 represents a pin fixedto the stop-bar 25, and projected through a slot 31, formed in thehousing plate 32. 33 represents a knurl loosely mounted on the pin30adapted to be slid into the orifice formed at one terminal ofy theslot 31, forming means for locking the stop-bar 25 in its upperposition, to free the same against Contact with any one of the stopsyupon the stop-rail 13. 34: represents an L-shaped bracket formedintegral with the plate 23, and extended beneath the stop-rail 13,formin a brace therefor, to prevent iexing or quivering of thestop-rail, when the stop-bar 25 engages one of the stops in the feedreleasing action.

When the stops 14, 15, 16, etc., are set relatively to each other, sayas illustrated in the carriage forward a second time, and continuing inits travel until the stop-bar 25 engages the second stop 15, and so on.The stops 14, 15, etc., may be adjustably secured upon the rail 13 inany well-known manner, `one form being as illustrated in Fig. 7, inwhich the stops are dove-tailed upon the rail and provided with a bolt35, the head of which engages the rail as the nut 36 is turned up,locking the stops rigidly in position upon the rail.

While I have shown stops as directly mounted on the rod longitudinallymovable to control the clutch on the feed shaft, and the trip orstop-engaging device on the carriage, it is obvious thatl these elementscould be transposed without any change of function, that is, the stopsmounted on a rigidbar, and the stop-engaging device on the carriage tobe provided with connections to rthe clutch, for operating the latter. v

The stops can be compiled upon one another in overlappingrelationship soas to bring their respective trip-engaging faces into verticalalineme'nt;` second, they can be adjusted while in telescopic relationinto a step-like formation, one over-lying. the other, and third, they'can be thrown out of telescopic relation and independently ad- Ij'iist'ed to occiipy positions at any desired tervals their' supportingrod.'

Certain conditions tif work require the second arrangement, naiii'edabove, which condition could onl be fulfilled by stps having thistelescoplngf or` over-lapping o rganization.

Having described my inventioii', I c'lailix l. In a machine tool' o'fthe' class described, i

having a traveling carriage, means for feeding the same, in combinationwith a seri of stopsadjusta'ble lin the path of the carriage movement,said stops having their basesiin the same horizontal plane and theircarriage arresting surfaces in different horizontal planesA andprojecting in position for engaging with said carriage to discontinueits feed at periods of its travel, said carriage arresting `surfaceshaving an overlapping arrangement relative to each other, whereby theymay be assembled to bring their points of carriage engagement intoalinement.

2. In a machine of the class described, a carriage formed with an apron,a feed mechanism therefor, a feed controlling clutch, a rod supported onthe bed in a horizontal plane parallel with the plane of the carriagetravel and located below the apron, a series of step-like stopsadjustably supported on said rod in the path of carriage movement andadapted tjo havetheir carriage arresting surfaces brought intooverlapping relation, a stop-engaging device on the carriage apronadapted to be set to engage a selected stop, and means whereby thecoaction of the stop engaging member with a stop is caused to actuatesaid clutch.V

3. In a machine of the class described, a bed, a carriage, feedmechanism, and feed control, a series of stops supported in the l pathof carriage travel with their trip enfeed.

gaging surfaces disposed in different horizontal planes, an adjustabletrip on the carriage operatively connected with the feed control, andmeans whereby the act of releasing the trip from contact `with a givenstop in adjusting it to engage the'next stop of thev series,coincidentally throws in the 4:. In a machine of theclass described, a

j bed, a carriage, feed mechanism for traversing the carriage on thebed, a clutch, clutch lcontrolling and stop supporting mechanism,

stops thereon adjustable from a coincident position to positions of anydesired relative intervals, said stops having thelr bases ad-y justablyclamped in the same horizontal plane, the trip engaging surfaces of thestops lying in different and meansv adapted to" engage said 'stpteacta't the clutch controlling mechanism clutch and thr'ow out the maincarriage ee f 5. nl a machine of the 'cias-S- described, a' bed, a'carriage'ffe'ed mechanism for tiavejs ingfthiJ carriage o'n' the bed, anorf l many heid iii driving engagement, ah aptoinatic trip'l and stopmechanism, the "stops being adjustabie from a coincident position 'tpositions of any desired relative intervals', means wherebyA the ftr'ipthrows 'outl the clutch, whereby the release of the stop enf gagiiigmember' automatically throws in the clutch for' the` neit cut;

6. In a device of the class described, a bed, a carriage formed with anapron;- feed lm'echanism for traversing the carriage on the bed, a rodhorizontally extended and supported in the path of carriage travel at apoint below the apron and adapted for controlling said feedingmechanism, a series of step-like stops adjustably secured on the rodwith their trip engaging surfaces lying in different horizontal planes,and an adjustable stop engaging member projected below the apron andadapted to engage said stops to actuate said feed controlling mechanismand to discontinue the carriage feed.

7. In a lathe, a bed, a carriage formed.

with an apron, feed, and feed control, a series of step-like stopsarranged in the path of carriage travel with their trip engagingsurfaces lying in different horizontal planes, the bases of said stopsbeing adjustably securedin the same horizontal plane, a stopengagingmember on the carriage apron, having a handle adapted to beindependently manipulated to set the stop engaging member in differenthorizontal positions corresponding to the planes of the various stops,all of said stops being located below the apron, and connections betweensaid trip mechanism and the main feed control.

8.- In a machine of the class described, a bed, a carriage, mechanismtherefor, a rod extended in the line of carriage travel, a series ofbracket stops4 alined at intervals `on' said rod, the tripping surfacesbeing exposed in different horizontal planes, a stop engaging member onthe carriage, having a handlethereon adaptingjt to bev manually andindependently set in different horizontal positions to engage a selectedstop, and means whereby said engagement actuates the clutch.

9. In a device of the class described, a bed, a carriage and its apronslidably mounted thereon, means .for feeding the carfriage, a series ofstops arranged with their bases in the same horizontal plane and theircarriage arresting surfaces arranged steplike in diderent horizontalplanes, sald stops being positioned in the path of carnage horizontalplanes,

travel below the apron, and a vertically ad- Vity 11o' and clutchcontrolled feed I justable member on the carriage apron adapted to beset to selectively engage each of said stops, whereby the-movement ofthe carriage is arrested.

10. In a device of the class described, a

. bed, a carriage with its apron slidably arresting surfaces beingpositioned in t e path of carriage travel, and adapted to be adjustedlongitudinally, the bases moving in the same and the engaging surfacesin different horizontal planes, said carriage arresting surfaces beingadapted to be assembled into overlapping relationship, and a verticallyadjustable member on the carriage, adapted to be set to selectivelyengage each of .said carriage arrestin surfaces, whereby the carriagemovement 1s arrested.

In testimony whereof, I have hereunto set my hand. l I

NICHOLAS D. CHARD. Witnesses: @LIVER B. KAISER,

EMMA SrnNnn.

